Merge git://git.denx.de/u-boot-dm

Here with some DM changes as well as the long-standing AT91 DM/DT
conversion patches which I have picked up via dm.

ARM: dts: at91: add dts files for sama5d4 Xplained

Add the device tree files for sama5d4 Xplained board.

The dts files are copied from Linux-4.4, do the following changes.
- add reg property for p

ARM: dts: at91: add dts files for sama5d4 Xplained

Add the device tree files for sama5d4 Xplained board.

The dts files are copied from Linux-4.4, do the following changes.
- add reg property for pinctrl node.
- move the gpio nodes(pioA, pioB, pioC ...) from the pinctrl child's
nodes to its slibling nodes.
- add the "u-boot,dm-pre-reloc" property to determine which nodes
which are needed by SPL and by the board_init_f stage.
- fix the compilation warnings.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>

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